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Supplemental Cash Flow Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Supplemental disclosure of cash flow information:    
Cash paid for interest $ 746 $ 787
Cash paid for taxes 70 537
Non-cash investing activities:    
Translation gain adjustment $ 3,380 $ 1,976